I know what the border dimensions of a movie poster are but does anyone know what the other dimensions are?as far as spacing of text and the production info at the bottom/font?
There aren’t any official specifications for font size, font, or letter spacing, etc. It’s really up to the designer in cooperation with the powers-that-be from the film/studio. Depending on who you work for, there may be a style guide that specifies that your company uses a specific typeface, a specific point size, etc. You might be required to provide certain information in a certain way (who gets credit first, producers or director? how many actors will be listed? etc…)
In general, the text at the bottom of film posters tends to be in an ultra-condensed typeface, which helps you fit more information into a relatively small area. It also tends to be in a light weight (the stroke of the letters themselves are thin) and in a low-contrast color to avoid drawing too much attention to itself.
In poster design, you want to think about 3 levels of view: 1) far away (it needs to convey its message to a person standing pretty far away); 2) close-up (obviously, it should still be attractive and have good typography for someone standing 2 feet away to read); and 3) medium (from about 15 feet away, I should be able to see the text at the bottom, and maybe make out a few recognizable names ("Director" or "Meryl Streep" etc.). So aim for that when you’re setting type.